The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 12, 1983
Filed:
Apr. 24, 1981
Applicant:
Inventors:
Naoki Maki, Tokai, JP;
Seiji Numata, Ibaraki, JP;
Kiyoshi Yamaguchi, Ibaraki, JP;
Heroe Yamamoto, Tokai, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
361 19 ;
Abstract
A superconductive coil has both its terminals connected in parallel with a protecting device which has a diode and a unipolar d.c. motor connected in series with each other. The superconductive coil is further connected with an energizing d.c. power source through a switch. The conductive direction of the diode is so selected that the d.c. motor is driven by the energizing energy of the superconductive coil when the switch is opened in the quenching operation of the superconductive coil.